diff --git a/dist/obs-bundled-gems.spec b/dist/obs-bundled-gems.spec
index fbc26181e31..a3a96ddf557 100644
--- a/dist/obs-bundled-gems.spec
+++ b/dist/obs-bundled-gems.spec
@@ -127,6 +127,8 @@ bundle config build.sassc --disable-march-tune-native
 bundle config build.nio4r --with-cflags='%{optflags} -Wno-return-type'
 bundle config force_ruby_platform true
 bundle config set --local path %{buildroot}%_libdir/obs-api/
+# patched gem with the fies from devel:languages:ruby:extensions
+cp %{_sourcedir}/open-build-service-*/dist/ruby-ldap-0.9.20.gem %{_sourcedir}/open-build-service-*/src/api/vendor/cache
 
 bundle install --local
 popd
diff --git a/dist/ruby-ldap-0.9.20.gem b/dist/ruby-ldap-0.9.20.gem
new file mode 100644
index 00000000000..bb8edc2913e
Binary files /dev/null and b/dist/ruby-ldap-0.9.20.gem differ